Abstract
From a viewpoint of dental metal allergy, many investigators have paid attention to the influences of metallic materials on the human body. It has also been required to explain the corrosion mechanism and to establish the evaluation method of corrosion resistance for these materials. The purpose of this study was to obtain fundamental data which explain the corrosion behavior of dental alloys.
AuCu-14 at%Ag pseudobinary alloy, simplified component and composition, were heat treated and compared with each datum of corrosion behavior in 1%NaCl solution.
In the potential range of ±0.3 V (vs. SCE), assumed intraoral condition, sample aged at 250°C for 100 ks after solution treatment showed significantly higher corrosion activity than other heat treatment conditions (p<0.001).
The result showed that dissolution of alloy components from the metallic restoration were influenced by heat treatment. Thus it was suggested that anodic polarization measurement could be used as an evaluation method of corrosion resistance for dental alloys.
